Hoist



June 3o, 1925. 1,543,684

F. M, SLATER HoIsfr Filed March 5, 1923 22e-al 25H INVENTOR Hl5 ATT NEY Patented June 30, 1925.

UNITED STATES f 1,543,684 PATENToFFICE.

`ERED M. SLATER, `or EASTON, PENNSYLVANIA irssIGNoR To INGERSOLERANE con.l PANY, or JERSEY CITY, NEW JERSEY, A CORPORATION oF NEW JERSEY.

HOIST.

Application filed March 5, 1923. Serial No. 622,779.

To all whom t may con-cern:

Be it known that I, FRED M. SLATER, a citizen of the United States. and a resident of Easton, county of Northampton, State of Pennsylvania, have invented a certain Hoist, of which the following is a specification, accompanied by drawings.

This invention relates to hoists, but more especially to a power driven hoist of the double drum type, in which either drum may be driven from a common driving shaft. Such hoists shown for example, in U. S. Patent No. 1.421,183, granted June 27th, 1922, to Jesse Ditson, are particularly useful for haulage purposes or in connection with other work in which the load is carried by a continuous rope or cable, adapted to be Wound upon the haulage or lifting drum as it is unwound from the tail rope drum.

Similarly to the patent referred to, the objects of the present invention are to enable two drums, as for instance, a haulage drum and a tail rope drum, to b e driven from a common source by improved means and devices, which automatically disconnect one drum and connect the other drum tothe driving shaft in accordance with the direction of rotation of the shaft.

In accordance with my invention, the opposed drivers carried by the drums respectively are provided with ratchet faces and the main driver, ywhich rotates with the driving shaft, carries a movable member for automatically connecting the main driver to one or the other of the opposed drivers in accordance with the direction of rotation of the driving shaft., but in addition to these elements, other means are included `for insulingthat. the movable member is actuated into engagement with one or the other ot the opposed drivers.'n The movable member maybe in the form oll a pawl` and is moved or rocked from one side to lheother. to engagcone or the other of the opposed drivers.

Further objects of the invent ion will hereinafter appear and to all of these ends the invention consists of the hoist described and claimed in this specitication and shown in one of' its preferred forms in the accompanying drawings, in which Figure l is a longitudinal sectional elevation of the hoist partly broke-u away,

Figure .2 is a transverse sectional view on the line 2*?, of Figure l looking in the directlfjui oil the arrows. and

adapted to bemanipulated the bolts Y.

Figure 3 is a detail top plan view of a portion of the hoist partly in section, on the line 3 3 of Figure l.

Referring to the drawings, the base plate A on which the hoist is mounted, is provided wlth a clamping member or portion preferably in the form yof a saddle clamp B having the clamping bolts C for securing the hoist to a column, cross bar or other support. Any suitable motor may be provided for the hoist and in this instance a fluid pressure motor is indicated, having the frame D mounted on the base plate A, and a casing G secured to the f 'ame D by the cap bolt-s H. Fluid pressure, as for instance co1npressed air, is supplied to the motor through a suitable inlet, (not shown) controlled by a suitable valve K in the valve chest L by the valvelever In this instance, the motor is assumed to be a reversible motor, the reversal of which is controlled by the valve lever O. i

A center bearing Q, shown in this instance as a tubular support in the form of a shell, having a tubular body and a fianged portion R, in this instance forms a part of the frame D. vThe opposite end of the cent/er bearing is supported in the gear box S, which may be suitably secured to 'the base plate A. A center hearing retaining screw U secures the center bearing to the inner wall of the gear box S. The gear box cover X is secured to the gear b ox by means of The construction of the motor and frame so far described, has a minimum number of parts, is strong and compact, easily assembled and dis-assembled, and permits ready accessibility to the operative parts of. the hoist.

A main driving shaft a passing longitudinally through the center bearing Q is supported in the. bearings b and c and is connected to be rotated by the motor in any suitable manner. A driving pinion lz. is keyed to 'the driving shaft a, and meshes with an intermediate gea-r 0- journaledon the counter shaft j) mounted in the gear box cover X. The internradiate gear 0 is provided with the bearings f] and ll', and an intermediate pinion s in this instance -forming a portion of the intermediate gear 0, meshes with the internal gear f of the main driver w pret'- erabl \Y in the form of a hollow rotatable shall adapted to rotate ou the center bearing Q from which main driver, power is llo preferably rotates u on the center bear-ingy Q and the tail rope rum mounted beside the drum a in line therewith and to which the` tail rope 1/ is connected, preferably rotates upon the main driver u as a convenient and;v compact construction, indicated par ticularly in Figure 1. Such construction offI the drums materially reduces 'the over-al1 len th of the hoist vand produces a compact am? well balanced hoist.

Means are provided fork automaticallyconnecting the main driver u to one. or the other of the drums fu and in accordance with thel direction of rotation of the drivingy shaft a, and for thisv purpose the haulage drum 'v is provided with a driver .e prefen' ably in the form of an annular ring or plate having clutch members in the form of teethr 2 on its face merging into thel cam surfaces 3. The haulage drum driver z` is suitably secured -to the haulage drum by meansof the bolts 4.

The tail rope drum :v is likewise provided with a driver 5 opposed to the driver s and also preferably in the form of an annular ring or plate having clutch members on its face in the form, of teeth 6, facing in the opposite direction from the teeth 2 onj thev driver z and merging into the cam surfaces 3. The tail rope drum driver 5 is secured to the tail rope drum a: by means of rivets 8.

rIfhe main driver u, is provided with 'a radially disposed carrier or driving head u' rigidly fixed thereto and having one or more movable clutch members 9, preferably in the form of shiftable pawl's or dogs pivotally and reciprocably mounted thereon within the recesses 10 formed between the projections 12 and projecting from the carrier between the clutch members or ratchet faces of the opposed drivers ya and 5,-so that the pawls 9 may engage eitherv one of the drum drivers in accordance with the direction of rotation of the driving shaft a: and consequent rotation of the shaft u. Each pawl or dog 9, of which there may be one or more, as desired, is preferably mounted on a reciprocable pivot pin 13 and secured thereto as by means of transverse locking pins 14. Only one dog 9 need ordinarily be used and the dogs as shown are mounted in the` free ends -of the driving head u remote from the shaft u for alternate engagement with the drums to rotate them in opposite directions. The pivot pins are rotatable within the projections 12 of the carrier or head and each pivot pin is provided with a rifled portion 14 engaging a rifle nut 16 held in position by the pins 17. Sufficient clearance is Vprovided for the pawls within the recesses 10 in the carrier, to permit the rified pivot pin 13 to reciprocate or move longitudinally in the head, and in somoving the riiled connection between the pin-s and the rifle nuts, causes the pins. to rotate-about their longitudinal axes,

4'thus rocking the pawls in one direction or the otherr and causing them to engage one or the other of the op osed drivers, one upon eitherfside of the driving head u'. The rifle pins and nuts constitute meansin addition to the cam surfaces of the ratchet teeth 2 and 6-vof the opposed drivers for actuatin the pawls and insuring 'that they are move into engagement with one or theother of the opposed drivers, althoI arnnotto" be understood as limiting the invention to thel construction shown, since other equivalent means could be provided for actuating the ipawls'within the scope of my invention, as

defined in the claims appended hereto.

Obviously, th'e-riflcd connection between i 4a pin'13 and a rifle nut 16l normally holds the dog or pawl in either of its` drivingk tions, because the dog is restrained rockin movement unless relative reciproca,` n

tion'ta es place between the pin 13 .andthe carrier or head u.

In the operation of the hoist so far de-r scribed, if lit be assumed that the driving shaftV a is rotating clockwise in the direction of the arrow 18, indicated inFigure 2, the

main driver u will be rotated by the train vof gearing described, in the opposite direction, as indicated by the arrow 19 on the same figure, and the pawls 9 will have beenactuated by their rifie pins and nuts into engagement with the teeth 2 on the haulage drum driver z,'as indicated in the figures, thus driving the haulage drum lv in the same direction as the main driver u, but in the opposite direction to the rotation of the drivlngshaft a. The arrow 20 in Figure 3 on `the haulage drum o, indicates the,` direction of the rotation of said drum under lsuch circumstances when power is applied 'to the drum to wind, up the tail rope. 'Under this condition, thetail rope drum m is disconnected from the driving shaft a but is-freely rotated in the same direction as the haulage drum fu, as the rope is un-wound from said tail rope drum.

It is to be understood that the width or thickness of the pawls 9 is less than the distance between the opposed ratchet teeth 2 and 6 of the opposed drivers z and 5, so that the awls cannot engage both vsets of teeth at t e same time. The device is operative with one pawl only, but severalare shown for illuzstrative purposes. lVhen usin one pawl, if a projection 12 should brea for lnstance, a, pawl can be inserted between two other projections 12 and an entire new head is not required. `Upon reversing the direction of rotation of the driving shaftv a and causing it to rotate counter-clockwise in the opposite direction to the arrow 18 in Figure 2, the direction of rotation of the main drivera will be reversed, and as the main driver and carrier u" start to rotate in the opposite direction to that in which they had been rotated,

the cam surfaces of the ratchet teeth cooperate with the l awls and in addition the rifle pins 13 of t e pawls will be rotated about their longitudinal axes by the movement of the rifle n uts 16 and the pawls will be rocked into sure engagement with the ratchet teeth 6 of the opposite driver 5, thus driving the tail rope drum oppositely to the direction of rotation of the driving shaft a. In such case, the rope will be wound up on the tail rope drum and the haulage drum o will be rotated freely in the same direction as the tail ro e drum, as the rope is un-wound from t e haulage drum. One drum or the other will be automatically connected to the driver from the driving shaft as often as the direction of rotation of the driving shaft is reversed.

In a hoist of the character described, a brake should be provided for one of the drums, and although it is unnecessary to provide a brake for both drums, in some instances two brakes may be' preferable, and I have shown a brake for each drum. In this instance, the tail rope drum may be conveniently provided with a ange 21 to which the brake band 22 having a suitable lining is applied. A brake lever 23 suitable mechanical connection, not indicated in detail, may be provided between the brake lever 23 and the brake band 22 for tightening and loosening said brake. Similarly a brake band 25 is applied lto the flange 26 of the haulage drum o and suitably connected to be operated by the brake lever 27.

I claim:

l. In a hoist, the combination of a frame, a driving shaft, two drums rotatable about the driving shaft, a moto-r connected to operate the driving shaft, opposed drivers carried by said drums respectively, a main driver connected to be rotated by the driving shaft, a pawl pivot-ed to the main driver for automatically connecting said main driver to one or the other of the said opposed drivers in accordance with the direction of rotation of the driving shaft, and additional means for rocking said pawl about its pivot and insuring that it is moved into engagement with one or the other of said opposed drivers.

2. In a hoist, the combination of a frame,

a driving shaft, two drums rotatable aboutv the driving shaft, a motor connected to operate the driving shaft, opposed drivers carried by said drums respectively, a main driver connected to be rotated by the driving shaft, a rifle pin and nut carriedby the main driver, and a pawl on said rifle pin for automatically connecting said main driver to one or the other of said opposed drivers in accordance with the direction of rotation of the driving shaft.

In testimony whereof I have signed this specification.

FRED M. SLATER. 

